Rosemount 2051C Pressure Transmitter

Fits continuous differential or gage pressure loops that need a coplanar process connection and a configurable 4–20 mA HART (or Fieldbus / PROFIBUS / WirelessHART) output.

Key advantages

Coplanar DP/GP platform — differential to ±2000 psi; gauge to 2000 psi across published range codes.
Up to ±0.05% span — standard to ±0.065%; high-accuracy option P8 to ±0.05% / 0.05% reference.
Protocol choice — 4–20 mA HART, FOUNDATION Fieldbus, PROFIBUS PA, or WirelessHART.
Manifold-ready coplanar — 1/4–18 NPT on flanges/manifolds with broad wetted-material options.

Typical applications

DP flow, filter, and level applications on coplanar manifolds.
Gauge-pressure points sharing the 2051C platform and spare parts.
Plants standardized on HART, FF, PA, or WirelessHART hosts.

Selection guide

Pressure type & range — Differential −25…+25 inH2O to −2000…+2000 psi; gauge −25…+25 inH2O to −14.2…2000 psi (ranges 1–5). Pick the range code that covers your calibrated span.
Accuracy — Up to ±0.065% of span (std); high-accuracy option P8 up to ±0.05% of span / 0.05% reference accuracy.
Output / protocol — 4–20 mA HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART (IEC 62591). Confirm DCS/PLC protocol before ordering.
Supply — 10.5–42.4 VDC (4–20 mA HART, no load). Check loop resistance and barrier drop.
Process connection — Coplanar process connection; 1/4–18 NPT on flanges/manifolds; alternate process connections available.
Wetted materials — 316L SST / Alloy C-276 and other process-connection / isolator options per PDS. Match media chemistry and fill fluid.
Ambient — Continuous ambient −40…185 °F (−40…85 °C) per PDS life note; see performance ambient-effect tables.
Housing & IP — Aluminum or SST (CF-3M / 316L cast) or engineered polymer (code P). NEMA 4X, IP66, IP68 when properly installed (polymer housing also IP66/67/68).
Electrical — Terminal block in field housing; conduit entries per housing option.
Display — Optional LOI / LCD.

Common mistakes

Ordering a range code whose upper range limit is far above the working span — you lose resolution at the bottom of the scale.
Specifying 316L when media need Alloy C-276 or another isolator — wetted material is a model-code choice.
Mixing Fieldbus/PROFIBUS/WirelessHART expectations with a 4–20 mA HART loop design and 10.5–42.4 VDC supply assumptions.
Claiming SIL or hazardous-area coverage without the matching order codes and certificates on the quote.
Assuming every housing meets the same IP line; polymer (code P) and metal housings differ — check the order code against the PDS.
Leaving media temperature / overpressure blank in the RFQ — those limits are configuration-dependent and must be confirmed on the quote for the chosen order codes.

When to RFQ / what to tell us

Pressure type (differential / gage) and required calibrated span + units.
Media, process temperature, and preferred fill (silicone or other).
Wetted materials and coplanar / flange / manifold connection.
Output protocol and available supply voltage / loop load.
Ambient, IP needs, and hazardous-area / SIL marks required.
Display, remote seal / manifold yes/no, quantity, ship-to country.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	24642
Brand	Rosemount
Model	2051C
Product type	transmitter
Pressure type	differential (family also gage by range code)
Measuring range	Differential −25…+25 inH2O to −2000…+2000 psi; gauge −25…+25 inH2O to −14.2…2000 psi (ranges 1–5)
Accuracy	Up to ±0.065% of span (std); high-accuracy option P8 up to ±0.05% of span / 0.05% reference accuracy
Output signal	4–20 mA HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART (IEC 62591)
Supply voltage	10.5–42.4 VDC (4–20 mA HART, no load)
Process connection	Coplanar process connection; 1/4–18 NPT on flanges/manifolds; alternate process connections available
Electrical connection	Terminal block in field housing; conduit entries per housing option
Wetted materials	316L SST / Alloy C-276 and other process-connection / isolator options per PDS
Housing material	Aluminum or SST (CF-3M / 316L cast) or engineered polymer (code P)
IP rating	NEMA 4X, IP66, IP68 when properly installed (polymer housing also IP66/67/68)
Ambient temperature	Continuous ambient −40…185 °F (−40…85 °C) per PDS life note; see performance ambient-effect tables
Display	Optional LOI / LCD
Communication	HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART
Approvals	ATEX; IECEx; FM; CSA; SIL2; SIL3; CE
Hazardous area	Multiple regional hazardous-location approvals in PDS Product certifications section (order-code dependent)
Diaphragm seal	Remote seal / manifold / primary-element assemblies available on Coplanar platform
Fill fluid	Silicone and other fill options per ordering
Mounting	Coplanar direct mount to manifolds, seals, or primary flow elements
Notes	SKU is 2051C (measurement type D differential or G gage). Ranges and materials are order-code configurable. Specs from Emerson PDS 00813-0100-4101 Rev RG (March 2026). Media temperature and overpressure are not single catalog limits — confirm on quote.

Documents

Rosemount 2051 product data sheet (PDF)

FAQ

Q: DP or gage — which 2051C configuration do I need? A: Match the process reference. Differential for orifice/filter/level across a tap pair; gage when the low side sees atmosphere. Range codes 1–5 cover both — state the type and span in the RFQ.

Q: Is ±0.05% of span always available? A: High-accuracy option P8 is up to ±0.05% of span / 0.05% reference accuracy. Standard accuracy is up to ±0.065% of span. Lock the option with the accuracy your loop needs.

Q: Which approvals can I claim on the nameplate? A: Only those in the OEM documentation and ordered codes: ATEX, IECEx, FM, CSA, SIL2, SIL3, CE. Hazardous-location protection is order-code dependent.

Q: What should I send for a quote? A: Pressure type and span, media and temperature, wetted materials, process connection, protocol and supply, IP / area class, display and mounting, quantity. Compatible with systems using Rosemount 2051C if you need a drop-in check — we do not claim authorized-dealer status.